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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #ifndef __IPC_H__ |
29 | #ifndef __IPC_H__ |
30 | #define __IPC_H__ |
30 | #define __IPC_H__ |
31 | 31 | ||
32 | /* Length of data being transfered with IPC call */ |
32 | /* Length of data being transfered with IPC call */ |
33 | /* - the uspace may not be able to utilize full length */ |
33 | /* - the uspace may not be able to utilize full length */ |
34 | #define IPC_CALL_LEN 4 |
34 | #define IPC_CALL_LEN 4 |
35 | 35 | ||
36 | /** Maximum active async calls per thread */ |
36 | /** Maximum active async calls per thread */ |
37 | #ifdef CONFIG_DEBUG |
37 | #ifdef CONFIG_DEBUG |
38 | # define IPC_MAX_ASYNC_CALLS 4 |
38 | # define IPC_MAX_ASYNC_CALLS 4 |
39 | #else |
39 | #else |
40 | # define IPC_MAX_ASYNC_CALLS 4000 |
40 | # define IPC_MAX_ASYNC_CALLS 4000 |
41 | #endif |
41 | #endif |
42 | 42 | ||
43 | /* Flags for calls */ |
43 | /* Flags for calls */ |
44 | #define IPC_CALL_ANSWERED (1<<0) /**< This is answer to a call */ |
44 | #define IPC_CALL_ANSWERED (1<<0) /**< This is answer to a call */ |
45 | #define IPC_CALL_STATIC_ALLOC (1<<1) /**< This call will not be freed on error */ |
45 | #define IPC_CALL_STATIC_ALLOC (1<<1) /**< This call will not be freed on error */ |
46 | #define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to |
46 | #define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to |
47 | * userspace, will be discarded */ |
47 | * userspace, will be discarded */ |
48 | #define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */ |
48 | #define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */ |
49 | #define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to answer */ |
49 | #define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to answer */ |
50 | #define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */ |
50 | #define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */ |
51 | 51 | ||
52 | /* Flags of callid (the addresses are aligned at least to 4, |
52 | /* Flags of callid (the addresses are aligned at least to 4, |
53 | * that is why we can use bottom 2 bits of the call address |
53 | * that is why we can use bottom 2 bits of the call address |
54 | */ |
54 | */ |
55 | #define IPC_CALLID_ANSWERED 1 /**< Type of this msg is 'answer' */ |
55 | #define IPC_CALLID_ANSWERED 1 /**< Type of this msg is 'answer' */ |
56 | #define IPC_CALLID_NOTIFICATION 2 /**< Type of this msg is 'notification' */ |
56 | #define IPC_CALLID_NOTIFICATION 2 /**< Type of this msg is 'notification' */ |
57 | 57 | ||
58 | /* Return values from IPC_ASYNC */ |
58 | /* Return values from IPC_ASYNC */ |
59 | #define IPC_CALLRET_FATAL -1 |
59 | #define IPC_CALLRET_FATAL -1 |
60 | #define IPC_CALLRET_TEMPORARY -2 |
60 | #define IPC_CALLRET_TEMPORARY -2 |
61 | 61 | ||
62 | 62 | ||
63 | /* Macros for manipulating calling data */ |
63 | /* Macros for manipulating calling data */ |
64 | #define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval)) |
64 | #define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval)) |
65 | #define IPC_SET_METHOD(data, val) ((data).args[0] = (val)) |
65 | #define IPC_SET_METHOD(data, val) ((data).args[0] = (val)) |
66 | #define IPC_SET_ARG1(data, val) ((data).args[1] = (val)) |
66 | #define IPC_SET_ARG1(data, val) ((data).args[1] = (val)) |
67 | #define IPC_SET_ARG2(data, val) ((data).args[2] = (val)) |
67 | #define IPC_SET_ARG2(data, val) ((data).args[2] = (val)) |
68 | #define IPC_SET_ARG3(data, val) ((data).args[3] = (val)) |
68 | #define IPC_SET_ARG3(data, val) ((data).args[3] = (val)) |
69 | 69 | ||
70 | #define IPC_GET_METHOD(data) ((data).args[0]) |
70 | #define IPC_GET_METHOD(data) ((data).args[0]) |
71 | #define IPC_GET_RETVAL(data) ((data).args[0]) |
71 | #define IPC_GET_RETVAL(data) ((data).args[0]) |
72 | 72 | ||
73 | #define IPC_GET_ARG1(data) ((data).args[1]) |
73 | #define IPC_GET_ARG1(data) ((data).args[1]) |
74 | #define IPC_GET_ARG2(data) ((data).args[2]) |
74 | #define IPC_GET_ARG2(data) ((data).args[2]) |
75 | #define IPC_GET_ARG3(data) ((data).args[3]) |
75 | #define IPC_GET_ARG3(data) ((data).args[3]) |
76 | 76 | ||
77 | /* Well known phone descriptors */ |
77 | /* Well known phone descriptors */ |
78 | #define PHONE_NS 0 |
78 | #define PHONE_NS 0 |
79 | 79 | ||
80 | /* System-specific methods - only through special syscalls |
80 | /* System-specific methods - only through special syscalls |
81 | * These methods have special behaviour |
81 | * These methods have special behaviour |
82 | */ |
82 | */ |
83 | /** Protocol for CONNECT - TO - ME |
83 | /** Protocol for CONNECT - TO - ME |
84 | * |
84 | * |
85 | * Calling process asks the callee to create a callback connection, |
85 | * Calling process asks the callee to create a callback connection, |
86 | * so that it can start initiating new messages. |
86 | * so that it can start initiating new messages. |
87 | * |
87 | * |
88 | * The protocol for negotiating is: |
88 | * The protocol for negotiating is: |
89 | * - sys_connect_to_me - sends a message IPC_M_CONNECTTOME |
89 | * - sys_connect_to_me - sends a message IPC_M_CONNECTTOME |
90 | * - sys_wait_for_call - upon receipt tries to allocate new phone |
90 | * - sys_wait_for_call - upon receipt tries to allocate new phone |
91 | * - if it fails, responds with ELIMIT |
91 | * - if it fails, responds with ELIMIT |
92 | * - passes call to userspace. If userspace |
92 | * - passes call to userspace. If userspace |
93 | * responds with error, phone is deallocated and |
93 | * responds with error, phone is deallocated and |
94 | * error is sent back to caller. Otherwise |
94 | * error is sent back to caller. Otherwise |
95 | * the call is accepted and the response is sent back. |
95 | * the call is accepted and the response is sent back. |
96 | * - the allocated phoneid is passed to userspace |
96 | * - the allocated phoneid is passed to userspace |
97 | * (on the receiving sid) as ARG3 of the call. |
97 | * (on the receiving sid) as ARG3 of the call. |
98 | * - the caller obtains taskid of the called thread |
98 | * - the caller obtains taskid of the called thread |
99 | */ |
99 | */ |
100 | #define IPC_M_CONNECT_TO_ME 1 |
100 | #define IPC_M_CONNECT_TO_ME 1 |
101 | /** Protocol for CONNECT - ME - TO |
101 | /** Protocol for CONNECT - ME - TO |
102 | * |
102 | * |
103 | * Calling process asks the callee to create for him a new connection. |
103 | * Calling process asks the callee to create for him a new connection. |
104 | * E.g. the caller wants a name server to connect him to print server. |
104 | * E.g. the caller wants a name server to connect him to print server. |
105 | * |
105 | * |
106 | * The protocol for negotiating is: |
106 | * The protocol for negotiating is: |
107 | * - sys_connect_me_to - send a synchronous message to name server |
107 | * - sys_connect_me_to - send a synchronous message to name server |
108 | * indicating that it wants to be connected to some |
108 | * indicating that it wants to be connected to some |
109 | * service |
109 | * service |
110 | * - arg1/2 are user specified, arg3 contains |
110 | * - arg1/2 are user specified, arg3 contains |
111 | * address of the phone that should be connected |
111 | * address of the phone that should be connected |
112 | * (TODO: it leaks to userspace) |
112 | * (TODO: it leaks to userspace) |
113 | * recipient - if ipc_answer == 0, then accept connection |
113 | * recipient - if ipc_answer == 0, then accept connection |
114 | * - otherwise connection refused |
114 | * - otherwise connection refused |
115 | * - recepient may forward message. Forwarding |
115 | * - recepient may forward message. Forwarding |
116 | * system message |
116 | * system message |
117 | * |
117 | * |
118 | */ |
118 | */ |
119 | #define IPC_M_CONNECT_ME_TO 2 |
119 | #define IPC_M_CONNECT_ME_TO 2 |
120 | /** This message is sent to answerbox when the phone |
120 | /** This message is sent to answerbox when the phone |
121 | * is hung up |
121 | * is hung up |
122 | */ |
122 | */ |
123 | #define IPC_M_PHONE_HUNGUP 3 |
123 | #define IPC_M_PHONE_HUNGUP 3 |
124 | /** Interrupt notification */ |
- | |
125 | #define IPC_M_INTERRUPT 4 |
- | |
126 | 124 | ||
127 | /** Send as_area over IPC |
125 | /** Send as_area over IPC |
128 | * - ARG1 - src base address |
126 | * - ARG1 - src base address |
129 | * - ARG2 - size of src as(filled automatically by kernel) |
127 | * - ARG2 - size of src as(filled automatically by kernel) |
130 | * - ARG3 - flags of the area being sent |
128 | * - ARG3 - flags of the area being sent |
131 | * - on answer ARG1 - dst base adress |
129 | * - on answer ARG1 - dst base adress |
132 | */ |
130 | */ |
133 | #define IPC_M_AS_AREA_SEND 5 |
131 | #define IPC_M_AS_AREA_SEND 5 |
134 | 132 | ||
135 | /** Get as_area over IPC |
133 | /** Get as_area over IPC |
136 | * - ARG1 - Where the area will be mapped |
134 | * - ARG1 - Where the area will be mapped |
137 | * - ARG2 - Expected size of area |
135 | * - ARG2 - Expected size of area |
138 | * - ARG3 - User defined argument |
136 | * - ARG3 - User defined argument |
139 | * on answer - the server sets ARG1 as src as address of the as_area |
137 | * on answer - the server sets ARG1 as src as address of the as_area |
140 | * to be shared, ARG2 is set to rights that will be used for sharing, |
138 | * to be shared, ARG2 is set to rights that will be used for sharing, |
141 | * which is returned as part of answer back to the receiver |
139 | * which is returned as part of answer back to the receiver |
142 | */ |
140 | */ |
143 | #define IPC_M_AS_AREA_RECV 6 |
141 | #define IPC_M_AS_AREA_RECV 6 |
144 | 142 | ||
145 | 143 | ||
146 | /* Well-known methods */ |
144 | /* Well-known methods */ |
147 | #define IPC_M_LAST_SYSTEM 511 |
145 | #define IPC_M_LAST_SYSTEM 511 |
148 | #define IPC_M_PING 512 |
146 | #define IPC_M_PING 512 |
149 | /* User methods */ |
147 | /* User methods */ |
150 | #define FIRST_USER_METHOD 1024 |
148 | #define FIRST_USER_METHOD 1024 |
151 | 149 | ||
152 | #ifdef KERNEL |
150 | #ifdef KERNEL |
153 | 151 | ||
154 | #include <synch/mutex.h> |
152 | #include <synch/mutex.h> |
155 | #include <synch/condvar.h> |
153 | #include <synch/condvar.h> |
156 | #include <adt/list.h> |
154 | #include <adt/list.h> |
157 | 155 | ||
158 | #define IPC_MAX_PHONES 16 |
156 | #define IPC_MAX_PHONES 16 |
159 | 157 | ||
160 | typedef struct answerbox_s answerbox_t; |
158 | typedef struct answerbox_s answerbox_t; |
161 | typedef struct phone_s phone_t; |
159 | typedef struct phone_s phone_t; |
162 | typedef struct { |
160 | typedef struct { |
163 | __native args[IPC_CALL_LEN]; |
161 | __native args[IPC_CALL_LEN]; |
164 | phone_t *phone; |
162 | phone_t *phone; |
165 | }ipc_data_t; |
163 | }ipc_data_t; |
166 | 164 | ||
167 | struct answerbox_s { |
165 | struct answerbox_s { |
168 | SPINLOCK_DECLARE(lock); |
166 | SPINLOCK_DECLARE(lock); |
169 | 167 | ||
170 | task_t *task; |
168 | task_t *task; |
171 | 169 | ||
172 | waitq_t wq; |
170 | waitq_t wq; |
173 | 171 | ||
174 | link_t connected_phones; /**< Phones connected to this answerbox */ |
172 | link_t connected_phones; /**< Phones connected to this answerbox */ |
175 | link_t calls; /**< Received calls */ |
173 | link_t calls; /**< Received calls */ |
176 | link_t dispatched_calls; /* Should be hash table in the future */ |
174 | link_t dispatched_calls; /* Should be hash table in the future */ |
177 | 175 | ||
178 | link_t answers; /**< Answered calls */ |
176 | link_t answers; /**< Answered calls */ |
179 | 177 | ||
180 | SPINLOCK_DECLARE(irq_lock); |
178 | SPINLOCK_DECLARE(irq_lock); |
181 | link_t irq_notifs; /**< Notifications from IRQ handlers */ |
179 | link_t irq_notifs; /**< Notifications from IRQ handlers */ |
182 | }; |
180 | }; |
183 | 181 | ||
184 | typedef enum { |
182 | typedef enum { |
185 | IPC_PHONE_FREE = 0, /**< Phone is free and can be allocated */ |
183 | IPC_PHONE_FREE = 0, /**< Phone is free and can be allocated */ |
186 | IPC_PHONE_CONNECTING, /**< Phone is connecting somewhere */ |
184 | IPC_PHONE_CONNECTING, /**< Phone is connecting somewhere */ |
187 | IPC_PHONE_CONNECTED, /**< Phone is connected */ |
185 | IPC_PHONE_CONNECTED, /**< Phone is connected */ |
188 | IPC_PHONE_HUNGUP, /**< Phone is hung up, waiting for answers to come */ |
186 | IPC_PHONE_HUNGUP, /**< Phone is hung up, waiting for answers to come */ |
189 | IPC_PHONE_SLAMMED /**< Phone was hungup from server */ |
187 | IPC_PHONE_SLAMMED /**< Phone was hungup from server */ |
190 | } ipc_phone_state_t; |
188 | } ipc_phone_state_t; |
191 | 189 | ||
192 | /** Structure identifying phone (in TASK structure) */ |
190 | /** Structure identifying phone (in TASK structure) */ |
193 | struct phone_s { |
191 | struct phone_s { |
194 | SPINLOCK_DECLARE(lock); |
192 | SPINLOCK_DECLARE(lock); |
195 | link_t link; |
193 | link_t link; |
196 | answerbox_t *callee; |
194 | answerbox_t *callee; |
197 | ipc_phone_state_t state; |
195 | ipc_phone_state_t state; |
198 | atomic_t active_calls; |
196 | atomic_t active_calls; |
199 | }; |
197 | }; |
200 | 198 | ||
201 | typedef struct { |
199 | typedef struct { |
202 | link_t link; |
200 | link_t link; |
203 | 201 | ||
204 | int flags; |
202 | int flags; |
205 | 203 | ||
206 | /* Identification of the caller */ |
204 | /* Identification of the caller */ |
207 | task_t *sender; |
205 | task_t *sender; |
208 | /* The caller box is different from sender->answerbox |
206 | /* The caller box is different from sender->answerbox |
209 | * for synchronous calls |
207 | * for synchronous calls |
210 | */ |
208 | */ |
211 | answerbox_t *callerbox; |
209 | answerbox_t *callerbox; |
212 | 210 | ||
213 | __native private; /**< Private data to internal IPC */ |
211 | __native private; /**< Private data to internal IPC */ |
214 | 212 | ||
215 | ipc_data_t data; /**< Data passed from/to userspace */ |
213 | ipc_data_t data; /**< Data passed from/to userspace */ |
216 | }call_t; |
214 | }call_t; |
217 | 215 | ||
218 | extern void ipc_init(void); |
216 | extern void ipc_init(void); |
219 | extern call_t * ipc_wait_for_call(answerbox_t *box, __u32 usec, int flags); |
217 | extern call_t * ipc_wait_for_call(answerbox_t *box, __u32 usec, int flags); |
220 | extern void ipc_answer(answerbox_t *box, call_t *request); |
218 | extern void ipc_answer(answerbox_t *box, call_t *request); |
221 | extern int ipc_call(phone_t *phone, call_t *call); |
219 | extern int ipc_call(phone_t *phone, call_t *call); |
222 | extern void ipc_call_sync(phone_t *phone, call_t *request); |
220 | extern void ipc_call_sync(phone_t *phone, call_t *request); |
223 | extern void ipc_phone_init(phone_t *phone); |
221 | extern void ipc_phone_init(phone_t *phone); |
224 | extern void ipc_phone_connect(phone_t *phone, answerbox_t *box); |
222 | extern void ipc_phone_connect(phone_t *phone, answerbox_t *box); |
225 | extern void ipc_call_free(call_t *call); |
223 | extern void ipc_call_free(call_t *call); |
226 | extern call_t * ipc_call_alloc(int flags); |
224 | extern call_t * ipc_call_alloc(int flags); |
227 | extern void ipc_answerbox_init(answerbox_t *box); |
225 | extern void ipc_answerbox_init(answerbox_t *box); |
228 | extern void ipc_call_static_init(call_t *call); |
226 | extern void ipc_call_static_init(call_t *call); |
229 | extern void task_print_list(void); |
227 | extern void task_print_list(void); |
230 | extern int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox); |
228 | extern int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox); |
231 | void ipc_cleanup(void); |
229 | void ipc_cleanup(void); |
232 | int ipc_phone_hangup(phone_t *phone); |
230 | int ipc_phone_hangup(phone_t *phone); |
233 | extern void ipc_backsend_err(phone_t *phone, call_t *call, __native err); |
231 | extern void ipc_backsend_err(phone_t *phone, call_t *call, __native err); |
234 | extern void ipc_print_task(task_id_t taskid); |
232 | extern void ipc_print_task(task_id_t taskid); |
235 | 233 | ||
236 | extern answerbox_t *ipc_phone_0; |
234 | extern answerbox_t *ipc_phone_0; |
237 | 235 | ||
238 | #endif |
236 | #endif |
239 | 237 | ||
240 | #endif |
238 | #endif |
241 | 239 |